[Files.app] Reenable TraverseSlideImagesOnDownloads tests

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Browser test for basic Chrome OS file manager functionality:
 //  - The file list is updated when a file is added externally to the Downloads
 //    folder.
 //  - Selecting a file and copy-pasting it with the keyboard copies the file.
 //  - Selecting a file and pressing delete deletes it.
 
@@ skipping 1306 matching lines @@
                        OpenMultipleImagesOnDownloads) {
   set_test_case_name("openMultipleImagesOnDownloads");
   StartTest();
 }
 
 IN_PROC_BROWSER_TEST_F(GalleryBrowserTest, OpenMultipleImagesOnDrive) {
   set_test_case_name("openMultipleImagesOnDrive");
   StartTest();
 }
 
-// Disabled due to flakiness: crbug.com/437293
-IN_PROC_BROWSER_TEST_F(GalleryBrowserTest,
-                       DISABLED_TraverseSlideImagesOnDownloads) {
+IN_PROC_BROWSER_TEST_F(GalleryBrowserTest, TraverseSlideImagesOnDownloads) {
   set_test_case_name("traverseSlideImagesOnDownloads");
   StartTest();
 }
 
-// Disabled due to flakiness: crbug.com/437293
 IN_PROC_BROWSER_TEST_F(GalleryBrowserTestInGuestMode,
-                       DISABLED_TraverseSlideImagesOnDownloads) {
+                       TraverseSlideImagesOnDownloads) {
   set_test_case_name("traverseSlideImagesOnDownloads");
   StartTest();
 }
 
 IN_PROC_BROWSER_TEST_F(GalleryBrowserTest, TraverseSlideImagesOnDrive) {
   set_test_case_name("traverseSlideImagesOnDrive");
   StartTest();
 }
 
 IN_PROC_BROWSER_TEST_F(GalleryBrowserTest, RenameImageOnDownloads) {
@@ skipping 112 matching lines @@
   StartTest();
 }
 
 IN_PROC_BROWSER_TEST_F(VideoPlayerBrowserTest, OpenSingleVideoOnDrive) {
   set_test_case_name("openSingleVideoOnDrive");
   StartTest();
 }
 
 }  // namespace
 }  // namespace file_manager